Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Stereo Vision System"”.
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A stereo vision system with automatic brightness adaptation
… of an automatic brightness adaptive imaging system for use in stereo vision algorithms implemented for a variety of processing architectures. A 256 x 256 array of wide dynamic range pixels with on-chip A/D converters provides the digital data path for a feedback network which controls the …
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Stereo Vision System Module for Low-Cost FPGAs for Autonomous Mobile Robots
<p>Stereo vision uses two adjacent cameras to create a 3D image of the world. A depth map can be created by comparing the offset of the corresponding pixels from the two cameras. However, for real-time stereo vision, the image data needs to be processed at a reasonable frame rate. Real-time stereo …
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Online 3D Reconstruction and Ground Segmentation using Drone based Long Baseline Stereo Vision System
… using unmanned aerial vehicle (UAV) based stereo vision. For this purpose, a long baseline stereo vision system has been designed and built. Application of this system is to work as part of an air and ground based multi-robot autonomous terrain surveying project at Unmanned Systems Lab …
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Stereovision Correction Using Modal Analysis
… and urban construction. The use of computer vision, or more specifically stereo vision, is one common method of gathering this information. By mounting a stereo vision system on the wings of an unmanned aircraft it becomes very useful tool. This technique however, becomes less accurate as …
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Stereo Vision Based Aerial Mapping Using GPS and Inertial Sensors
… grown in recent years to a point where unmanned systems are no longer limited by their capabilities. As such, the mission profiles for unmanned systems are becoming more and more complicated, and a demand has risen for the deployment of unmanned systems into the most complex of environments. …
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Depth estimation from 3D reconstructed scene using stereo vision
… produce a persistent need to develop assistive systems that can help those robots to do their job efficiently. Distance estimation is one of these applications that a lot of researches made to develop it. Visionary sensors such as stereo vision optimization method is one of the most efficient …
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Comparison of Three Dimensional Measurement Accuracy Using Stereo Vision
The stereo vision system has been widely used in recent years. The imaging process of a camera consists in projection from a three dimensional world to a two dimensional image in which one dimension of information has been lost. A vision system that consists of two cameras can use the implicit …
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Time Delay Mitigation in Aerial Telerobotic Operations Using Predictors and Predictive Displays
… investigates the use of a novel heterogeneous stereo-vision system to mitigate the effects of time delays in a UAV-based visual interface presented to a human operator. The heterogeneous stereo-vision system consists of an omnidirectional camera and a pan-tilt-zoom camera. Two predictive …
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Rangefinding in Fire Smoke Environments
… as well as a long-wavelength infrared (LWIR) stereo vision system developed in this research. The smoke was varied from dense, low temperature smoke to light, high temperature smoke for evaluation in a range of conditions. Through small-scale experiments on eleven different sensors, radar and …
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Automated Landing Site Evaluation for Semi-Autonomous Unmanned Aerial Vehicles
A system is described for identifying obstacle-free landing sites for a vertical-takeoff-and-landing (VTOL) semi-autonomous unmanned aerial vehicle (UAV) from point cloud data obtained from a stereo vision system. The relatively inexpensive, commercially available Bumblebee stereo vision camera was …
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Development of a Peripheral-Central Vision System to Detect and Characterize Airborne Threats
… rapid proliferation of small unmanned aircraft systems (UAS), the risk of mid-air collisions is growing, as is the risk associated with the malicious use of these systems. The airborne detect-and-avoid (ABDAA) problem and the counter-UAS problem have similar sensing requirements for detecting …
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Omnidirectional Vision for an Autonomous Surface Vehicle
… In order to implement a fully autonomous system, one of the essential problems is construction of an accurate, dynamic environment model. In Computer Vision this is called structure from stereo or motion (SFSM). The work in this dissertation addresses omnidirectional vision based SFSM for …
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3-D Point Cloud Generation from Rigid and Flexible Stereo Vision Systems
… virtual model of the surrounding environment the system is in. A stereo vision system utilizes two or more cameras, which capture images of a scene from two or more viewpoints, to create 3-D point clouds. A point cloud is a set of un-gridded 3-D points corresponding to a 2-D image, and is used to …
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A 4D photogrammetric system for studying flow-like landslides
This thesis presents a photogrammetric system developed for experimental studies of laboratory landslide models. The hardware captures granular flows as time-series three-dimensional (4D) point clouds, producing high-quality digital datasets of laboratory landslide experiments. The software …
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An investigation into the design of a satellite based stereo imaging sensor and the use of automatic image matching in the production of digital elevation models
… They are the design of a micro-satellite based stereo imaging sensor and the automatic matching of digital stereo images for automatic cartography applications. The two problems are related; they are both components of a stereo vision system. The research was initially motivated by the decision …
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A study of tool wear measurement by using image processing system
<p>Cutting tools in a manufacturing system play a significant role in metal cutting process. Cutting tools arc consumable. Tool wear affects the outcomes of machining processes such as machined· surface quality and it is normally used as an indicating parameter for tool life. It is crucial to …
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Depth information from image sequences using two-dimensional cepstrum
… comprising this thesis presents a new motion stereo model that is computationally less demanding and yields more accurate depth information than the existing methods. One of the traditional techniques for extracting depth information is to find the disparities of corresponding points in stereo …
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Situational Awareness of a Ground Robot From an Unmanned Aerial Vehicle
… This thesis focuses on the use of computer vision in the development of a situational awareness system that allows for safe deployment and operation of a ground robot from an unmanned aerial vehicle (UAV). A method for detecting utility cables in 3D range images is presented. This technique …
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High-quality dense stereo vision for whole body imaging and obesity assessment
… work of our lab, we developed a prototype active stereo vision system that demonstrated a potential to fulfill this goal. But the prototype required four computer projectors to cast artificial textures on the body which facilitate the stereo-matching on texture-deficient images (e.g., skin). This …
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